| Name | Meaning | Gender | Origin |
|---|
| Minka | Strong | Male | German |
| Minnie | Form of Williamina
| Female | English |
| Mino | French for Puss | Unisex | |
| Minou | | Unisex | |
| Minouche | | Unisex | Hebrew |
| Minx | | Unisex | |
| Misha | Variant of Michael.
| Male | Russian |
| Mojo | Good luck charm. | Unisex | |
| Molly | Bitter
| Female | English |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | |
| Muffy | | Unisex | |
| Mystery | Mystery | Female | English |
| Nancy | full of grace | Female | English |
| Natasha | birthday of the Lord | Female | Russian |
| Nathan | given | Male | Hebrew |
| Neo | from The Matrix movies | Male | Latin |
| Nibbles | | Unisex | |
| Nikita | unconquered | Male | Russian |
| Nitro | Short for Nitroglycerin a highly explosive liquid. | Male | |
| Noonoo | | Unisex | |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Oprah | Fawn | Female | Hebrew |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |